I have the same problem. I think one of my biggest factors in this is i always think i can add more, or make it better, then screw it up, and have to fix it…and on..and on..and on..On the upside of this, over time i get new ideas for it, sometimes i will stare at something for weeks trying to figure out what i can do to it or what it needs, ill have ideas but they dont seem to feel right..then all of a sudden it hits me, and its a perfect fit..so i tell myself time is helping create it, form it into what its suppose to be!